/*
 * @(#)XfeditRulebaseTablePanel.java        1.0 2000/05/09
 *
 * This file is part of Xfuzzy 3.0, a design environment for fuzzy logic
 * based systems.
 *
 * (c) 2000 IMSE-CNM. The authors may be contacted by the email address:
 *                    xfuzzy-team@imse.cnm.es
 *
 * Xfuzzy is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Xfuzzy is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

package xfuzzy.xfedit;

import xfuzzy.lang.*;
import xfuzzy.util.*;
import javax.swing.*;
import java.awt.*;

/**
 * Panel de representaci�m de la base de reglas en formato tabular
 * 
 * @author Francisco Jos� Moreno Velo
 *
 */
public class XfeditRulebaseTablePanel extends JPanel {

	/**
	 * C�digo asociado a la clase serializable
	 */
	private static final long serialVersionUID = 95505666603038L;

	//----------------------------------------------------------------------------//
	//                            MIEMBROS PRIVADOS                               //
	//----------------------------------------------------------------------------//

	/**
	 * Modelo asociado a la tabla de la representaci�n
	 */
	private XfeditRulebaseTableModel model;
	
	/**
	 * Tabla que contiene la representaci�n
	 */
	private JTable table;

	//----------------------------------------------------------------------------//
	//                                CONSTRUCTOR                                 //
	//----------------------------------------------------------------------------//

	/**
	 * Constructor
	 */
	public XfeditRulebaseTablePanel() {
		super();
		setLayout(new BoxLayout(this,BoxLayout.Y_AXIS));
	}

	//----------------------------------------------------------------------------//
	//                             M�TODOS P�BLICOS                               //
	//----------------------------------------------------------------------------//

	/**
	 * Actualiza el contenido del panel
	 */
	public void refresh(KnowledgeBase copy) {
		removeAll();
		model = new XfeditRulebaseTableModel(copy);
		if(!model.isValid()) {
			add(Box.createVerticalGlue());
			add(Box.createVerticalStrut(10));
			add(msglabel("Cannot represent this rulebase as a table"));
			add(Box.createVerticalStrut(10));
			add(msglabel("Rules must include only AND conectives"));
			add(msglabel("and equality relations"));
			add(Box.createVerticalStrut(10));
			add(Box.createVerticalGlue());
			model = null;
			return;
		}

		table = new XfeditRulebaseTableForm(model);
		table.setDefaultRenderer(XLabel.class,model);
		table.setDefaultRenderer(JComboBox.class,model);
		table.setDefaultRenderer(Object.class,model);
		table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		table.setColumnSelectionAllowed(false);
		table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
		table.getTableHeader().setReorderingAllowed(false);
		table.getTableHeader().setFont(XConstants.font);

		Box box = new Box(BoxLayout.X_AXIS);
		box.add(Box.createHorizontalStrut(10));
		box.add( new JScrollPane(table) );
		box.add(Box.createHorizontalStrut(10));

		add(Box.createVerticalGlue());
		add(Box.createVerticalStrut(10));
		add(box);
		add(Box.createVerticalStrut(10));
		add(Box.createVerticalGlue());
	}

	/**
	 * Obtiene las reglas y las almacena en la base de reglas
	 */
	public boolean getRules(KnowledgeBase copy) {
		if(model == null) return true;
		else return model.getRules(copy);
	}

	/**
	 * Elimina la posible selecci�n de la tabla
	 */
	public void clearSelection() {
		if(model != null) table.clearSelection();
	}

	//----------------------------------------------------------------------------//
	//                             M�TODOS PRIVADOS                               //
	//----------------------------------------------------------------------------//

	/**
	 * Genera una etiqueta con el mensaje especificado
	 */
	private Box msglabel(String msg) {
		JLabel label = new JLabel(msg);
		label.setFont(XConstants.font);
		label.setForeground(Color.red);
		Box box = new Box(BoxLayout.X_AXIS);
		box.add(Box.createHorizontalGlue());
		box.add(label);
		box.add(Box.createHorizontalGlue());
		return box;
	}
}

